CN105822771B

CN105822771B - Valve, valve actuator, cartridge and adapter for liquid handling system

Info

Publication number: CN105822771B
Application number: CN201610048587.2A
Authority: CN
Inventors: S·霍特尔; T·舒勒; M·那慕尔
Original assignee: Brita SE
Current assignee: Pirande Europe Ag
Priority date: 2015-01-26
Filing date: 2016-01-25
Publication date: 2020-03-17
Anticipated expiration: 2036-01-25
Also published as: EP3835266A3; TW201637704A; JP6847840B2; CN205639625U; JP2018513942A; EP3250513A1; EP3835266A2; AU2016212208B2; CN105822771A; KR20170107553A; RU2017130220A; WO2016120174A1; KR102174181B1; TWI692373B; DE202016008866U1; HK1246763A1; AU2016212208A1; RU2017130220A3; RU2715187C2

Abstract

A valve for regulating the flow of liquid through a passage in the wall of a cartridge of a liquid treatment system comprises at least a valve body (15) defining at least one port and at least one movable valve assembly (16) movable relative to the valve body (15). The at least one movable valve assembly (16) includes an adjustment member for selectively obstructing the flow of liquid through the at least one port and an actuation member for engaging a valve actuation device inserted into the cartridge. The actuating means is included in a mechanism for converting linear motion of the valve actuating device into rotational motion of the at least one movable valve assembly (16) and includes at least one pair of helical profiles and means for engaging each of the helical profile members (41a, 41 b; 63a, 63 b).

Description

Valve, valve actuator, cartridge and adapter for liquid handling system

Technical Field

The present invention relates to a valve for regulating the flow of liquid through a passage in the wall of a cartridge of a liquid treatment system, said valve comprising at least:

a valve body defining at least one port; and

at least one movable valve assembly movable relative to the valve body;

the at least one movable valve assembly includes an adjustment member for selectively impeding the flow of liquid through the at least one port and an actuation member for engaging a valve actuation device inserted into the cartridge.

The invention also relates to a reservoir for a liquid treatment system, comprising:

a cartridge, the cartridge comprising:

a chamber having an opening at an axial end through which a liquid treatment core is at least partially insertable in an axial direction;

a sealing surface for sealingly engaging a liquid treatment core at least partially inserted along its periphery;

a liquid passage through the chamber wall; and

a valve arranged to regulate the flow of liquid through the liquid passage.

The invention also relates to a device for actuating a valve, comprising a section (section) for engaging an actuating part of a movable valve assembly, wherein the section is insertable in an axial direction through an opening for allowing liquid to reach the valve.

The invention also relates to a liquid treatment cartridge having a housing comprising:

at least one liquid-permeable window forming a liquid inlet;

at least one liquid-permeable window forming a liquid outlet;

at least one process chamber, e.g. comprising a liquid process medium, located between and in liquid communication with liquid-permeable windows forming liquid inlets and outlets; and

a valve actuation device.

The invention also relates to an adapter for enabling placement of a replaceable liquid treatment cartridge in a cartridge holder of a liquid treatment system, said adapter comprising valve actuating means.

The invention also relates to a kit of parts for a liquid treatment system comprising such an adapter and a liquid treatment cartridge having a housing comprising:

at least one liquid-permeable window forming a liquid inlet;

at least one liquid-permeable window forming a liquid outlet; and

at least one process chamber, e.g. comprising a liquid process medium, is located between and in liquid communication with liquid permeable windows forming liquid inlets and outlets.

The invention also relates to a liquid treatment system.

Background

WO 2010/081845 a1 discloses a liquid treatment device in the form of a water filtration device provided with a liquid container for receiving unfiltered water and a collection container thereunder for receiving filtered water. The liquid container has a bottom wall in which a receiving chamber is arranged. The receiving chamber is formed by a peripheral wall and a bottom wall. A liquid treatment cartridge having a sealing edge, a cartridge wall and a cartridge bottom is inserted into the receiving chamber, said receiving chamber having an outlet opening in the bottom wall. A valve is inserted into the outlet opening from below, the valve having a valve seat body with a valve seat in the form of a molded sealing ring. The shut-off body is positioned against a valve seat designed as a sealing ring, which has a sealing disk interacting with the valve seat, on the underside of which a spherical projection is arranged, and on the upper side of which an element in the form of a control rod is arranged. The element designed as a control lever is provided with a cam surface on the outside. When the filter cartridge is fully and sealingly inserted into the receiving chamber, the sealing edge of the filter cartridge is tightly positioned against the inside of the receiving chamber peripheral wall. This prevents liquid from the liquid container from being able to reach the untreated receiving chamber, and thus from entering from this receiving chamber into the collecting container located below. The filter cartridge is provided with a recess and a valve actuating means in the form of an annular spindle is formed on the underside of the filter cartridge. The annular mandrel is immersed into the recess of the receiving chamber and extends into the region of the control rod such that the inner surface of the annular mandrel engages the cam surface of the control rod. In this way, the shut-off body is brought into an inclined position, so that the valve opening defined by the valve seat is released.

The problem with the shut-off flow inclination is that it lifts out of the valve seat on one side only. To create a larger passage for the water would require the shut-off fluid to be tilted through a larger angle. However, its range of motion is limited by the inner surface of the annular mandrel.

Disclosure of Invention

It is an object of the invention to provide a valve, a reservoir, a device for actuating a valve, a liquid-handling cartridge, an adapter, a kit of parts and a liquid-handling system of the type mentioned in the opening paragraph which provide alternative mechanisms for opening and at least partially closing a valve which can be kept relatively compact.

This object is achieved according to a first aspect by a valve according to the invention, which is characterized in that said actuating member is comprised in a mechanism for converting linear motion of the valve actuating means into rotational motion of said at least one movable valve assembly, and comprises at least one pair of helical profiles and means for engaging each of the members of the helical profiles.

The valve may be arranged to allow liquid flow when the correct type of valve actuation device fully and correctly engages the actuation member, the valve being used to regulate liquid flow through a passage in the cartridge wall of the liquid handling system. In other cases, the flow of liquid is reduced relative to this situation, for example substantially reduced to a no flow condition. In which case the valve may be considered to be in a closed state. The valve actuating means may be part of a liquid treatment cartridge for placement into the cartridge seat or part of an adapter for use with such a liquid treatment cartridge. The cartridge is typically part of a barrier for separating an upstream portion of the liquid handling system from a downstream portion where the treated liquid is collected. This can be signaled to the user if an attempt is made to insert a different type of core than the intended core into the core print or if the core is not properly placed into the core print. When the liquid flow is interrupted in this case, improperly treated or untreated liquid does not pass through the cartridge. It provides at least one signal to the user when only significantly reduced relative to the open configuration. The valve includes at least one valve body defining at least one port that is permeable to liquid and in fluid communication with the passageway. The at least one movable valve assembly includes an adjustment member. The adjustment member is movable relative to the valve body to block the port to a certain extent depending on its position, including its orientation for present purposes. The at least one movable valve assembly includes an actuating member for engaging a valve actuating device inserted into the cartridge. In most cases the valve actuating means will be a component of the liquid handling cartridge for placement into the cartridge seat. Such a core is actually placed into the core print by moving it towards the core print in a direction generally referred to herein as the axial direction. Because the actuating member is included in one mechanism for converting linear motion of the valve actuating device into rotational motion of the at least one movable valve assembly and includes at least one pair of helical profiles and means for engaging each of the helical profiles, a relatively compact mechanism is provided for converting motion in the axial direction of the actuating device into rotational motion about the axis or parallel axes. A linkage is not necessary. Furthermore, the movable valve assembly does not tilt. In one embodiment, the movable valve assembly is movable to the front of the at least one port or completely out of overlapping relationship with the at least one port. Alternatively, the rotational movement may be further converted into a linear movement in the opposite axial direction in order to fully lift it out of the valve seat. In each case, the components of the movable valve assembly need not move to one side (sideways) relative to the axis of rotation. Thus, the flow rate in the open configuration may be relatively high, but the valve may have a relatively small lateral dimension. This allows the use of a cartridge having a relatively high volume, particularly when the cartridge is configured such that the cartridge, once fully placed within the cartridge, surrounds the cartridge component in which the valve is disposed. The valve is particularly suitable for gravity driven systems. In such systems, there is a barrier separating the upstream portion from the downstream portion, with the cartridge disposed within the barrier. In use, the upstream portion is at a higher level than the downstream portion. Typically, the liquid handling wick will be inserted into the wick holder in a downward direction because the upstream portion is more accessible. The proposed mechanism for converting the linear downward movement of the core into movement of the adjustment member to move the valve out of the closed configuration is, for example, more compact than the alternative of using a lever of the first type to lift the adjustment member out of the valve seat.

The helical profile may be a helical profile, i.e. having a constant helix angle. It need not extend over a complete turn. Typically, the helical profile will have a constant radius relative to the axis about which it rotates. Thus, the term spiral as used herein is the same in meaning as when used to describe a winding slot in the side of a cylinder.

In one embodiment, the adjustment member and the actuation member are integral components forming a single body of the movable valve assembly.

The effect is to reduce the number of separate component parts of the valve. The single movable valve element may be a unitary body and thus a single component. Such a body may be obtained by moulding, for example injection moulding. The body may be made of a single material, such as plastic. Alternatively, it may be made of several materials, for example co-molded plastic.

In a variation of this embodiment, the body forming the movable valve assembly includes a recessed section between the actuating member and the adjustment member.

One effect is to allow liquid to flow past the movable valve member in an axial direction with less resistance. The at least one recessed section is at an axial position between the actuation member and the adjustment member, wherein the reference axis is the rotational axis. A further effect is that the valve member can be lighter, requiring less material. The actuating member and the adjustment member may have relatively large diameters. So that the force required for rotating the movable valve part can be smaller. The angle about which the adjustment member must be rotated to fully release the port may be smaller.

In one embodiment of the valve, the helical profile is defined by a helical groove for receiving a member for engaging the helical profile.

The effect is to allow opening and closing of the valve by interaction between the valve actuating means and the drive member of the movable valve assembly. Thus, if the valve actuation means is included in a liquid treatment cartridge, the valve may be opened when the cartridge is placed into the seat and closed when the cartridge is moved out of the seat in the opposite direction. The grooved profile provides opposing helical guide surfaces for engaging the follower. One helical guide surface is engaged when the follower moves in one axial direction and the other helical guide surface is engaged when the follower moves in the opposite axial direction. In practice, the actuating member of the movable valve assembly is shaped like a drum cam.

In a variant of this embodiment, the groove widens towards an axial end of the actuating member with respect to the axis of rotation of the at least one movable valve assembly.

This makes it easier to insert the follower into the grooved profile, given the relative difficulty of achieving precise alignment between the valve actuator and the actuating member prior to engagement.

In one embodiment of the valve, the actuation member comprises at least one of the at least one helical profile.

The valve actuating means normally provided on the liquid treatment cartridge or on the adapter forming a kit with the cartridge should be relatively simple, since both components, i.e. the liquid treatment cartridge or the adapter forming a kit with the cartridge, are intended for a single use or for a limited number of occasions. The parts defining the profile are relatively complex, if the profile is defined by grooves, so that at least the actuating parts comprise them. The actuating member is included in the valve of the cartridge and is designed to have a longer life and therefore potentially higher manufacturing costs than the valve actuating device.

In one embodiment of the valve, the at least one member for engaging the helical profile comprises at least one section of protruding thread.

This is provided such that linear motion is relatively reliably converted into rotational motion. The helical surfaces (one included in the helical profile and the other on the projecting thread) slide along each other. Thus providing a suitable screw drive rather than a cam and follower arrangement.

In one embodiment, at least one component of the mechanism comprised in the actuation part is arranged radially on the outside of the actuation part.

At least one component of the actuation mechanism comprised in the actuation part thus faces radially outwards. In this embodiment, the actuation member may have a relatively small diameter and need not be hollow. This makes the movable valve assembly more robust.

In a variant of this embodiment, the actuating member is defined by a collar extending in the axial direction to define a space for housing a hollow projecting member of the actuating device, and the collar and the actuating member are one-piece parts forming a single body of the movable valve assembly.

This allows the actuating device to be provided with a hollow protruding part, on the inner surface of which are provided a pair of at least one helical profile and an element for engaging the part of the helical profile. The collar serves to limit the movement of the movable valve assembly relative to the valve body, for example when the cartridge is turned upside down. This may be the case where the cartridge is included in a liquid treatment system component intended to be washed in a dishwasher. An inwardly projecting flange may interact with the collar to limit its range of axial movement relative to the valve body. The collar may also serve to limit lateral movement or tipping of the movable valve assembly relative to an axis aligned with or parallel to the axis of rotation.

In one embodiment, the mechanism includes a plurality of members for engaging one helical profile and a plurality of helical profiles.

The applied off-axis force (relative to the axis of rotation) may otherwise tend to tilt the actuating member of the movable valve assembly, while it is desirable to rotate the actuating member substantially only about an axis aligned with the direction of insertion of the valve actuating device. The plurality of joints between the helical profile and the engagement element may be evenly distributed around the axis to counter the risk of tilting.

In a variant of this embodiment, the parts for engaging the helical profiles are fewer in number than the helical profiles for engaging them.

The effect is that there are more rotational positions of the valve actuating member in which the engagement elements can enter into engagement with the profile. This makes it easier to move the valve actuating member into the correct rotational position within the cartridge.

In one embodiment of the valve, the valve body comprises at least one, e.g. a series of inclined surfaces facing at least partly in an axial direction and partly in a tangential direction with respect to the axis of rotation of the at least one movable valve assembly, and the at least one inclined surface is arranged to support at least one of the at least one movable valve assembly at least in a position of the movable valve assembly allowing a liquid flow through the port.

The axis of rotation will typically be an upright axis, so that gravity will pull the valve assembly towards the inclined surface. Since the inclined surface partly faces in the axial direction and partly in the tangential direction with respect to the rotational axis of the at least one movable valve assembly, the part of the supported movable valve assembly supported by the inclined surface will slide down along the inclined surface, at least when slightly oscillating to overcome the static friction. The valve assembly will rotate during the process. This is one embodiment of a biasing mechanism for moving the valve assembly to one of a limited number of rotational positions out of engagement with the valve actuating means.

In one variant, the at least one inclined surface defines a series of ridges (creet) and valleys (rough) arranged about, e.g. substantially about, the axis of rotation.

There are thus a plurality of such default rotational positions. Only a slight rotation and limited axial movement of the movable valve assembly is required for one of a plurality of such default rotational positions.

In one variant of the embodiment, wherein the valve body comprises at least one, e.g. a series of inclined surfaces facing at least partly in an axial direction and partly in a tangential direction with respect to the axis of rotation of the at least one movable valve assembly, and the at least one inclined surface is arranged to support at least one of the at least one movable valve assembly in at least a plurality of positions of the movable valve assembly allowing liquid to flow through the port, the at least one inclined surface further partly facing in a radial direction, e.g. radially inwards.

The effect is also to centre the supported movable valve assembly (e.g. at least the adjustment member) with an axis corresponding to or parallel to the predetermined axis of rotation. A small range of axial movement of the assembly relative to the valve body is possible even with relatively small forces acting thereon, as further contact for pivoting the movable valve assembly components is minimized.

In a particular variant of embodiment, wherein the valve body comprises at least one, e.g. a series of inclined surfaces facing at least partly in an axial direction and partly in a tangential direction with respect to the axis of rotation of the at least one movable valve assembly, and the at least one inclined surface is arranged to support at least one of the at least one movable valve assembly in at least a plurality of positions of the movable valve assembly allowing a liquid to flow through the port, the supported movable valve assembly comprises a plurality of fins protruding in the axial direction towards the support surface.

This ensures that the supported movable valve assembly can slide relatively unimpeded practically downward along the inclined surface. The inclined surface may enter the recess between the ribs. The supported movable valve assembly can be relatively small without becoming too expensive to be practical (thinned).

In one variation thereof, the fins of the supported movable valve assembly are defined by inclined surfaces, e.g., having an angle of inclination that substantially matches the angle of inclination of the inclined surfaces supporting the movable valve assembly.

In this variant, the lug can slide down the inclined surface relatively easily.

In a variant of embodiment, wherein the valve body comprises at least one, e.g. a series of inclined surfaces facing at least partly in an axial direction and partly in a tangential direction with respect to the axis of rotation of the at least one movable valve assembly, and the at least one inclined surfaces is arranged to support at least one of the at least one movable valve assembly in at least a position of the movable valve assembly allowing a liquid flow through the port, the valve body comprises one sealing surface for engaging an adjustment member independent of the inclined surfaces.

Thus, the inclined surface and the sealing surface may be optimized for their respective purposes. The ramped surface biases the supported movable valve member into one of a limited number of default positions. The sealing surface provides a good seal to substantially prevent any flow of liquid when the supported movable valve member is in such a default position. The inclined surface can be made relatively hard and smooth to provide a low friction. The sealing surface can be made softer or even of a different material. Alternatively, for example, the inclined surface and the sealing surface may be coated differently. Furthermore, the angle of inclination and the shape of the inclined surface do not have to be maintained within such tight tolerances, as would be the case if they were also used as sealing surfaces.

In one embodiment of the valve, the valve body defines a valve seat for receiving an adjustment member having a port disposed therein.

With the port disposed in the valve seat, the valve is moved out of the closed configuration by moving, e.g., lifting, the adjustment member out of the valve seat. The valve seat may thus seal relatively well without increasing the resistance to movement of the movable valve assembly, as would occur, for example, for a slide valve or a sliding gate valve.

In a variant of this embodiment, the valve body comprises at least one, for example a series of, inclined surfaces facing partly in the axial direction and partly in the tangential direction with respect to the axis of rotation of the at least one movable valve assembly comprising the adjustment member, and the at least one inclined surfaces are arranged to support the at least one movable valve assembly comprising the adjustment member.

This solves the problem of how to move the adjustment member into and out of the valve seat, assuming that the actuation member rotates when engaged by the valve actuation device. The orientation of the inclined surface is such that rotation causes the adjustment member to be raised and allows the adjustment member to be lowered, depending on the direction of rotation. Thus, downward movement of the valve actuating device engaging the actuating member of the movable valve assembly causes it to rotate, which in turn causes it to lift relative to the valve seat. The valve and the valve actuating means may effectively form a screw drive mechanism for converting linear movement of the valve actuating means in one axial direction into linear movement of the at least one movable valve member in the opposite axial direction.

In one variation of the embodiment, wherein the valve body defines a valve seat for receiving an adjustment member in which the port is disposed, the valve seat is substantially conical and the adjustment member includes a mating surface corresponding in shape to at least a portion of the tapered side surface.

The effect is to provide a better seal in the closed configuration of the valve. The mating surface is a conical or frustoconical surface. The mating surfaces are substantially parallel and achieve a self-centering effect.

In one variation of the embodiment, wherein the valve body defines a valve seat for receiving an adjustment member in which the port is disposed, the valve body includes at least one cross-bar, such as a grating, spanning the port.

This avoids that a proper closing of the valve is prevented by a foreign part of the port from the side opposite to the side on which the adjustment member is positioned.

In an embodiment, the movable valve assembly is comprised of>1·10³kg·m_- ³A dense material. For example, the material may have>1.3·10³kg·m^-3The density of (c). The movable valve assembly may, for example, have>1·10³kg·m^-3The bulk density of (a).

Thus, the movable valve assembly may be free to move within a limited range relative to the valve body, at least when not engaged by the valve actuation device. If it is submerged in water, it will remain in its intended position and will not float. This is particularly useful where the valve body defines a valve seat for receiving the regulating member, with the port being provided in the valve seat. The movable valve assembly will remain seated, provided the valve body is arranged to support the movable valve assembly in the closed configuration. Thus, when the cartridge is submerged in water but no suitable liquid handling cartridge is in the correct position in the cartridge, the valve will remain in the closed configuration. Bulk density is relevant if the movable valve assembly closes a void within it, for example to reduce the amount of material required to produce it.

In an embodiment, the movable valve assembly and the valve body are made of different materials.

Each can thus be made of a material best suited for its intended purpose. For example, the material of the valve body may be selected to be compatible with the material of at least a portion of the remainder of the cartridge that the valve body material contacts when installed. The material of the movable valve assembly may for example be selected to have a sufficient density so that the movable valve assembly does not float in the liquid to be treated.

In one embodiment, the valve body includes a radially outer lateral surface that is at least one of conical and substantially cylindrical in shape, such as a cylinder.

This allows the valve body to be inserted or secured into the passage through the cartridge. The cartridge may, for example, have an axial end wall in which the passage is defined. The valve may be mounted by inserting it into the channel, for example from the opposite side to the side on which the core is located in use.

In one variant, the flange is provided at an axial end of the valve body with respect to the axis of rotation of the at least one movable valve assembly.

This facilitates the mounting of the valve, in particular the valve body, in a cartridge of the type just described. The valve body is inserted through a defined distance. Furthermore, the flange helps to prevent leakage between the valve body and the channel wall.

In one embodiment of the valve, at least one axial section of the movable valve assembly (which section comprises at least the axial section of the adjustment member) is received within a recess having a substantially circular cross-section and is positioned at an axial end of the valve body, e.g. an axial end opposite to the axial end at which the flange is provided.

The valve assembly is movable to rotate at least partially within the valve body. The installation of the valve is relatively simple in that the movable valve assembly can be placed in the recess before the valve body is installed with relatively little risk of losing the valve assembly during installation.

According to another aspect, the reservoir for the liquid treatment system according to the invention comprises:

a cartridge, the cartridge comprising:

a liquid passage through the chamber wall; and

according to the invention, the valve is arranged to regulate the flow of liquid through the liquid passage.

The cartridge includes a chamber having an opening at an axial end with respect to a reference axis generally corresponding to or parallel to the axis of rotation of the at least one movable valve assembly. The liquid treatment core sealingly engages along its periphery when inserted through the opening in the axial direction through a defined distance. Liquid can thus only enter the chamber through the wick, the chamber being provided with at least one liquid-permeable inlet on the upstream side of the seal and at least one liquid-permeable outlet on the downstream side of the seal. The liquid passage is provided through the chamber wall, which is otherwise closed. In this way, liquid entering the chamber through the wick may exit the chamber, or liquid entering the chamber through the channel may exit through the wick, depending on the intended direction of flow. In gravity-driven liquid handling systems, depending on whether the cartridge is disposed on the downstream side of the reservoir wall or in the reservoir, the cartridge is suspended from the reservoir in the case where the cartridge is disposed on the downstream side of the reservoir wall, and is inserted when the reservoir is empty and then filled with the liquid to be handled in the case where the cartridge is disposed in the reservoir. In each case, the reservoir is emptied by the liquid treatment cartridge. The valve regulates the flow of liquid to ensure that the reservoir can only be emptied at normal flow rates when the valve actuation means has placed the valve in the open position. Otherwise, the valve will be closed, thereby significantly reducing or nullifying the flow rate.

In one embodiment, at least a portion of the liquid passage is defined by a cartridge member, the valve body is inserted into the liquid passage, and the at least one movable valve assembly is retained by and between the valve body and at least a section of the cartridge member that protrudes into the liquid passage.

This embodiment has a relatively small number of individual components. The cartridge component may be a single component, such as an integral component of the reservoir. If there is only one movable valve assembly, the valve adds only two parts. The movable valve assembly may be a loose part rather than being bonded to the valve body. However, a third component for preventing the loss of the movable valve assembly is not required. In particular, it is not necessary to provide a cage for holding the movable valve assembly. The protruding section leaves the space entrance between the valve body and the protruding section within which the movable valve assembly is retained unobstructed. Such that liquid can enter the space and exit through the at least one valve port when the valve is in the open configuration.

In a variation of this embodiment, the at least one protruding section of the cartridge component is at least one ridge protruding from a sidewall of the liquid channel around the central opening.

Hereby it is achieved that the actuating member is arranged such that it can be engaged by the valve actuating means. The protruding end of the valve actuation device may be inserted through the central opening to engage an actuation member of the movable valve assembly.

In one particular variant, at least two of the ridge ends are tangentially spaced so as to allow liquid to pass between them in use.

When the actuating means is engaged with the actuating member, i.e. inserted through the central opening, the valve should be opened in order to allow liquid flow. To avoid restricting the flow through the valve too much, this variant allows liquid to flow through the actuating means through the space or spaces between the ends of the ridges. The inner edge of the ridge or ridges may in fact contact the insert part of the actuating means in order to fulfil their guiding function.

In one embodiment of the reservoir, the liquid channel is defined by a cartridge member made of the same material as the valve body.

This makes it easier to bond the valve body to the cartridge by gluing, in particular welding. In a particular variant, the valve body is ultrasonically welded to the cartridge. The material of the movable valve assembly may be different from the material of the valve body.

In one embodiment of the reservoir, at least a section of the liquid channel is defined by a cartridge part protruding relative to at least a section of a chamber wall, e.g. a wall at an axial end opposite an opening through which a liquid treatment cartridge may be inserted.

The valve will typically have a significant height that exceeds the thickness of the chamber wall. In this embodiment, the walls may be relatively thin. If the chamber is open at the top, in use, this wall will be the chamber bottom wall in use. A protruding member may be included in the wall and completely surround the valve.

In a variation of this embodiment, the protruding cartridge member and the section of the chamber wall from which the protruding cartridge member protrudes are an integral part of a single assembly.

And thus there is no need to separately install the protruding cartridge part. The protruding member may be no larger than the protrusion of the chamber wall.

In one variant of embodiment, wherein at least one section of the liquid passage is defined by a cartridge part projecting with respect to at least one section of a chamber wall, for example a wall at an axial end opposite to an opening through which a liquid treatment cartridge can be inserted, the projecting cartridge part projecting into the chamber.

In this variation, the reservoir may have few or no protruding parts on its outside that could be damaged during handling or transportation from the factory to the consumer. The protruding cartridge component is surrounded and shielded by the chamber wall. The core may be provided with a recess in the axial end wall so as to enclose the protruding part when inserted. Cores of this type are described, for example, in US 2009/0294346a 1. Since the opening of the chamber is typically located at the top, in use, some liquid is left in the chamber when the reservoir has been emptied through the wick. The liquid-permeable outlet or outlets of the wick may thus remain submerged in the liquid after the reservoir has been emptied. This may be useful in situations where the liquid treatment core comprises a bacteriostatic substance dissolved in a liquid and the liquid is a potable liquid such as drinking water. A further effect is that the reservoir has a reduced height. In embodiments where the reservoir is suspended in a container for collecting the treated liquid, this leaves more room for treated liquid for a given overall height of the system.

In one embodiment of the reservoir, the chamber has a cross-sectional shape which is elongate, for example elliptical, when viewed in a direction perpendicular to the axis.

This applies at least to the cross-section in the vicinity of the chamber opening. The remainder of the reservoir will typically have a matching shape. The shorter body axis of the reservoir and chamber may have dimensions relative to the typical width of the refrigerator door compartment. The longer body axis may be relatively long to increase the cross-sectional area. These body axes may be the symmetry axes of the cross-sectional shape. The liquid treatment core will typically have a matching cross-sectional shape, having a relatively large volume and a relatively low flow resistance.

In one embodiment of the reservoir, the chamber is defined in the appendage of the reservoir bottom wall section.

This allows the reservoir to be completely emptied of the liquid to be treated by operation of gravity.

In one embodiment, the reservoir includes at least one external ridge for supporting the reservoir within an upper portion of a container for collecting processed liquid.

This embodiment is particularly useful for implementing a primarily or fully gravity driven liquid handling system.

According to another aspect, the device for actuating a valve according to the invention (for example a valve according to the invention) is characterized in that said section is comprised within one mechanism for converting a linear movement of the actuating device in an axial direction into a rotational movement of the movable valve assembly and comprises at least one pair of helical profiles and means for engaging each of the parts of the helical profiles.

The actuation device is insertable in an axial direction through the opening for allowing liquid to reach the valve such that the section comprised in the insertion part engages the actuation part of the movable valve assembly. This movement may be a substantially linear movement, for example corresponding to movement of the core into the core print. Since said section is comprised in one mechanism for converting linear movement of the actuating means in the axial direction into rotational movement of the movable valve assembly and comprises at least one pair of helical profiles and means for engaging each of the parts of the helical profiles, the linear movement is converted into rotational movement of the movable valve assembly opening the valve.

In one embodiment of the valve actuating device, the section for engaging the actuating member of the movable valve assembly comprises a hollow member for receiving at least an axial end section of the actuating member of the movable valve assembly, and the components of the mechanism comprised in the section for engaging the actuating member of the movable valve assembly are provided on an inwardly facing surface of the hollow member.

Thus, the actuating member of the movable valve assembly may have a relatively small diameter but still be relatively robust, i.e. withstand multiple engagements with the valve actuating device. For a given radial distance of the spiral profile to the axis of rotation, the valve assembly may have a relatively small diameter.

In a variation of this embodiment, the means of the mechanism included in the section for engaging the actuating part of the movable valve assembly protrudes from an inwardly facing surface of the hollow part.

The hollow part has a relatively small wall thickness compared to the part in which the spiral profile in the form of a groove is arranged. Instead, such a profile may be provided on the actuating member of the movable valve assembly.

In one embodiment, the section of the actuating member for engaging the movable valve assembly is at least partially, e.g. completely, arranged within the recess of the device.

Thus, the section is shielded for a large portion. The risk of continued damage of the segment, i.e. the segment is prevented from being inserted through the valve opening, is thus reduced. The section for engaging the actuation member may particularly comprise a hollow member for receiving at least an axial end of the actuation member of the at least one movable valve assembly. The component may then be a relatively narrow cylindrical or conical post, for example.

In a variant of this embodiment, the recess is defined by a side wall which closes on itself around the section for engaging the actuating member of the movable valve assembly and is radially spaced from this section.

The radial spacing leaves room for liquid to flow to or from the valve opening.

In one embodiment, the section for engaging the actuating member of the movable valve assembly comprises a hollow protruding member having a side wall provided with at least one discontinuity extending over at least a portion of its axial extent to an edge at a free axial end of the hollow protruding member.

One effect is that the hollow protruding members may be deformed, e.g. compressed or widened, to provide a resilient force. This may be used to clamp or snap the hollow component to a cartridge component defining a passage and/or opening through which the hollow component may be inserted. Once inserted, the snap-fit connection or clamping force holds the actuating means in place. Even if the hollow protruding member is not deformed in this way, the discontinuity reduces the flow resistance of the valve when the section of the valve actuating device has been inserted.

In one embodiment of the valve actuating device, the actuating device comprises a member at a distance from the section for engaging the actuating member of the movable valve assembly for retaining said actuating device in the cartridge comprising the valve.

Thus, once the actuation means has moved the valve into the open configuration, at least the axial position of the actuation means is fixed. Thus, it is ensured that the open configuration is maintained until a force sufficient to overcome the holding force is applied to the valve actuating means.

In an embodiment of the valve actuation apparatus, wherein the actuation apparatus comprises a vessel-shaped (vessel-shaped) member, and wherein said section for engaging the actuation member of said movable valve assembly is provided at a bottom wall at an axial end of the vessel-shaped member, said apparatus further comprises an outwardly facing edge on a side wall of the vessel-shaped member, the edge extending around a circumference of the vessel-shaped member.

The container-shaped part may in particular be a container-shaped part of a liquid treatment core. Alternatively, it may be part of an adapter, wherein the receptacle-shaped member is configured to sealingly receive a liquid treatment core and thereby sealingly insert the liquid treatment core into the core holder. An outwardly facing edge on the sidewall engages the cartridge to prevent passage of liquid between the container shaped member and the cartridge. Instead, the liquid is forced to flow through the container-shaped member.

Thus, in one embodiment, the actuating means comprises a container-shaped member, the section for engaging the actuating member of said movable valve assembly being provided at a bottom wall at an axial end of the container-shaped member, and at least one liquid-permeable window being provided in the bottom wall.

In a variant of this embodiment, at least one liquid-permeable window is provided adjacent to a section for engaging an actuation member of the movable valve assembly.

Thus, liquid may flow around, rather than through, the section of the actuating member for engaging the at least one movable valve assembly. In particular in case the section for engaging the actuation member is hollow and arranged to receive the actuation member, liquid may not easily flow through such section, as the actuation member will block the liquid flow. Thus, it is not sufficient to provide a liquid-permeable window at the axial end of the hollow portion opposite to the axial end inserted into the valve opening.

In one embodiment of the device, the section for engaging the actuating member of the movable valve assembly comprises a portion for engaging a helical profile of the mechanism, and the portion for engaging the helical profile is shaped for insertion into a helical groove defining the helical profile.

One effect is to allow the valve to be opened and closed by interaction between the valve actuating means and the actuating member of the movable valve assembly. Thus, if the valve actuation means is included in a liquid treatment cartridge, the valve may be opened when the cartridge is placed in the seat and closed when the cartridge is moved out of the seat in the opposite direction. Each groove provides opposing helical guide surfaces for engaging the follower. One helical guide surface is engaged when the follower moves in one axial direction and the other helical guide surface is engaged when the follower moves in the opposite axial direction. In practice, the actuating member of the movable valve assembly is shaped like a drum cam.

In a variant of this embodiment, the means for engaging the helical profile taper towards the axial end of the section for engaging the actuating means of the movable valve assembly.

This makes it easier to insert it into the grooved profile.

In one embodiment, the section for engaging the actuating member of the movable valve assembly comprises a member for engaging a screw profile of the mechanism, the member for engaging the screw profile comprising at least one section of protruding thread.

The larger contact area ensures that the tangential force is distributed over a larger axial distance. A better conversion of linear motion into rotational motion is achieved.

In one embodiment of the device, the mechanism comprises a plurality of members for engaging one helical profile and a plurality of helical profiles.

The applied off-axis force (relative to the axis of rotation) may otherwise tend to tilt the actuating member of the movable valve assembly, ideally causing it to rotate substantially only about an axis aligned with the direction of insertion of the valve actuating device. The plurality of joints between the helical profile and the engagement element may be evenly distributed around the axis to counter the risk of tilting.

In a variant of this embodiment, the mechanism parts are substantially evenly distributed around a central axis of the segment, the segment for engaging the at least one actuation part of the movable valve assembly being provided with said mechanism parts, while said central axis is aligned with or parallel to the insertion direction.

This further reduces the risk of tilting. Furthermore, a degree of rotational symmetry is achieved such that there is not only one single rotational position of the valve actuating device which allows the valve actuating device to be inserted through the opening for allowing liquid and engage the actuating member of the at least one movable valve assembly.

In a variant of embodiment, wherein the mechanism comprises a plurality of parts for engaging one helical profile and a plurality of helical profiles, the parts for engaging one helical profile are fewer in number than the helical profiles for engaging them.

One effect is that there are more rotational positions of the valve actuating member where the engagement element can enter into engagement with the profile. This makes it easier to move the valve actuating member into the cartridge in the correct rotational position. Furthermore, the valve actuating device is less difficult to manufacture, in particular when the member for engaging the helical profile is provided on the inner surface of the hollow section for insertion through the valve opening and at least the hollow section is injection molded.

According to another aspect, a liquid treatment cartridge according to the invention has a housing comprising:

at least one liquid-permeable window forming a liquid inlet;

at least one liquid-permeable window forming a liquid outlet;

a valve actuation device according to the present invention.

The liquid handling cartridge thereby directly actuates the valve, assuming the valve actuation means is the correct shape and the cartridge is correctly inserted. The liquid then flows through the at least one liquid-permeable window forming the liquid inlet, through the treatment chamber and out of the at least one liquid-permeable window forming the liquid outlet.

In an embodiment of the liquid treatment cartridge, the housing is at least partially inserted through the opening of the cartridge chamber, wherein the housing comprises at least one rim extending around the circumference of the housing and closing on itself around an axis parallel to the insertion direction.

The liquid treatment cartridge may be retained and/or sealed against a sidewall of the chamber to prevent bypass of liquid between the cartridge housing and the chamber wall.

In one variant, the edge spaces apart a liquid-permeable window forming the at least one liquid inlet from a liquid-permeable window forming the at least one liquid outlet.

Whereby the liquid is forced to flow through the housing.

In one variant of the embodiment, wherein the housing is at least partially insertable through the cartridge chamber opening, wherein the housing comprises at least one edge extending around a circumference of the housing and closing on itself around an axis parallel to the insertion direction, the edge comprising a radially inner section at least partially protruding in a radial direction with respect to a housing side wall along the circumference of the housing.

Thus, there is room for the radially inner section to flex when the core is inserted into the core print cavity. This provides a spring force that ensures a better seal. The radially inner section may, for example, form a flexure bearing (also referred to as a living hinge) for the radially outer section of the rim.

In a particular variant, the edge comprises a radially outer section having at least one section angled to the radially inner section and presenting an at least partially radially outwardly facing surface.

Whereby the radially inner section may be relatively thin. The radially outer segment still provides a relatively large area of contact with the mating surface of the core print due to the segment being angled with respect to the radially inner segment and presenting an at least partially radially outwardly facing surface. The flexing of the radially inner section may allow the outwardly facing surface to conform to the mating surface.

In a particular variant thereof, the radially outer section comprises two sections which are angled with respect to the radially inner section extending in opposite axial directions.

The total area of contact with the mating surface of the cartridge is increased.

In a particular variant of one variant, wherein the rim comprises a radially outer section having at least one section angled to the radially inner section and presenting an at least partially radially outwardly facing surface, one of the at least one section of the radially outer section forming an upstanding ridge surrounding a liquid permeable window forming the at least one liquid inlet.

This allows liquid to be collected in the reservoir, with the cartridge being provided at the bottom of the reservoir.

In one embodiment of the liquid treatment cartridge, the housing comprises a container-shaped part and a cap-shaped part enclosing the container-shaped part.

This embodiment is suitable for embodiments in which the process chamber comprises a loose, for example granular, liquid process medium.

In a variation of this embodiment, the container-shaped member includes a flange at the open axial end, and the cap-shaped member is placed over and attached to the flange.

One effect is to facilitate the formation of a bonded joint between the container-shaped part and the cap-shaped part. The cap-shaped part may in particular be welded (e.g. ultrasonic welding) to the container-shaped part, wherein the flange provides a movement for a tool (e.g. an anvil or an ultrasonic probe) relying on mechanical forces.

In one variant of the embodiment in which the housing is at least partially insertable through the cartridge chamber opening, the housing comprises at least one edge extending around the circumference of the housing and closing on itself around an axis parallel to the insertion direction, the edge comprising a radially inner section at least partially protruding in a radial direction with respect to a housing side wall along the circumference of the housing, at least a part of the radially inner section of the edge forming a flange.

The rim can thus be placed at the axial end of the container-shaped part, since there is no need to leave room for a separate flange. The edge serves a dual purpose. The radially outer portion of the rim may be free to allow the rim to flex to some extent when the liquid handling core is inserted into the cartridge. The cap part reinforces at least the radially inner section of the rim, so that it can be relatively thin.

According to another aspect, an adapter for enabling placement of a replaceable liquid treatment cartridge into a cartridge seat of a liquid treatment system according to the present invention comprises a valve actuation device according to the present invention.

The manufacturer may use the adapter to produce a series of two or more liquid treatment cartridges having the same housing but having different liquid treatment components, for example different liquid treatment media arranged within a chamber through which liquid passes in use. To ensure that a user of a particular liquid treatment system (in which only each of the liquid treatment cartridges fits) uses a particular intended one of a series of liquid treatment cartridges, the liquid treatment cartridges may be supplied in sets, each set having a different style of adapter. The contour shape or spacing may determine whether the adapter is suitable for operating the valve. If not, the core supplied with the adapter cannot be used.

Thus according to another aspect, a kit of parts for a liquid treatment system according to the invention comprises an adapter according to the invention and a liquid treatment cartridge having a housing comprising:

at least one liquid-permeable window forming a liquid inlet;

at least one liquid-permeable window forming a liquid outlet;

at least one process chamber, e.g. comprising a liquid process medium, is located between and in liquid communication with liquid impermeable windows forming liquid inlets and outlets.

According to another aspect, a liquid treatment system according to the invention comprises a reservoir according to the invention, a replaceable liquid treatment cartridge and a valve actuating device according to the invention.

The valve actuating means may be included in the liquid treatment cartridge or in a separate adapter.

Drawings

The invention will be explained in further detail with reference to the accompanying drawings, in which:

FIG. 1 is a plan view of a gravity-driven liquid treatment system including a reservoir for liquid to be treated;

FIG. 2 is a perspective view of a first alternative liquid-handling cartridge for use in the system;

FIG. 3 is a front view of the liquid treatment core of FIG. 2;

FIG. 4 is a side view of the liquid treatment core of FIGS. 2 and 3;

FIG. 5 is a cross-sectional view of the liquid treatment core of FIGS. 2-4;

FIG. 6 is an enlarged view of a detail of the view shown in FIG. 5, showing components of the valve actuator included in the liquid processing core;

FIG. 7 is a cross-sectional view taken from the side of the liquid treatment core shown in FIGS. 2-6;

FIG. 8 is an enlarged view of a detail of the view shown in FIG. 7, showing components of the valve actuator;

FIG. 9 is a cross-sectional perspective view of the liquid treatment core shown in FIGS. 2-8;

FIG. 10 is a bottom plan view of the liquid treatment core of FIGS. 2-9;

FIG. 11 is an enlarged view of a detail of the view shown in FIG. 10, showing components of the valve actuator;

FIG. 12 is a perspective view of components of the valve actuator;

FIG. 13 is a cross-sectional perspective view of components of the valve actuator;

FIG. 14 is a perspective view of a container-shaped assembly member of the housing of the liquid treatment cartridge shown in FIGS. 2-13;

FIG. 15 is a top view into the container-shaped assembly member of FIG. 14;

FIG. 16 is a perspective view of a cap assembly component of the liquid treatment cartridge housing shown in FIGS. 2-15;

FIG. 17 is a perspective view taken from the underside of the cap assembly component shown in FIG. 16;

FIG. 18 is a cross-sectional view of a lower section of a reservoir of the liquid treatment system shown in FIG. 1;

fig. 19 is a cross-sectional view of a cartridge, the reservoir of fig. 18 being provided with a cartridge;

FIG. 20 is a cross-sectional perspective view of the cartridge;

FIG. 21 is an enlarged view of a detail of the view shown in FIG. 20;

FIG. 22 is a cross-sectional perspective view showing the liquid treatment cartridge of FIGS. 2-13 inserted into the cartridge receptacle of FIGS. 20-21 and engaged with the valve, the cartridge receptacle being provided with the valve;

FIG. 23 is a perspective view of the valve body of the valve;

FIG. 24 is a second perspective view of the valve body of FIG. 24 from a slightly different angle;

FIG. 25 is a cross-sectional perspective view of the valve body;

FIG. 26 is a perspective view of the movable valve assembly of the valve of FIGS. 22-25;

FIG. 27 is a perspective view from a different angle of the movable valve assembly shown in FIG. 26;

FIG. 28 is a perspective view from the underside of the movable valve assembly of FIGS. 26-27;

FIG. 29 is a perspective view from another angle of the movable valve assembly of FIGS. 26-28;

FIG. 30 is a cross-sectional view of the movable valve assembly of FIGS. 26-29;

FIG. 31 is a cross-sectional perspective view of the cartridge of FIGS. 19-22 and the valve and adapter combination of FIGS. 23-30, the adapter including valve actuating means for actuating the valve;

FIG. 32 is a perspective view showing a bottom wall of a liquid handling core for use with the adapter of FIG. 31;

FIG. 33 is a perspective view of the adapter shown in FIG. 32;

FIG. 34 is a perspective view from the underside of the adapter of FIGS. 32-33;

FIG. 35 is a perspective view from the underside, from a different angle, of the adapter of FIGS. 32-34;

FIG. 36 is a cross-sectional perspective view of the adapter, cartridge and valve with the adapter engaging the valve;

FIG. 37 is a partial cross-sectional view showing a cartridge seat, valve, adapter and the liquid handling cartridge of FIG. 32; and

FIG. 38 is a detailed cross-sectional view showing the adapter engaged with the valve and received within a recess in the bottom wall of the liquid treatment cartridge of FIG. 32.

Detailed Description

The gravity-driven liquid treatment system comprises a container, in the illustrated example in the form of a jug 1, for collecting treated liquid, such as aqueous liquid. Alternative types of containers include carafes and bottles.

A reservoir 2 in the shape of a funnel is suspended in the jug 1. For this purpose, the reservoir 2 is provided with an external ridge 3 extending around most of its periphery. The external ridge 3 is supported by a flange in the side wall which is located at the spout portion of the jug 1. The jug 1 with the reservoir 2 suspended therein is closed by a lid 4, a filling opening being defined in the lid 4. The filling opening is closed by a closure element 5. The reservoir 2 is positioned adjacent to the pouring spout 6 so that it does not need to be removed during use.

The reservoir comprises a cartridge comprising a cartridge chamber 7 having an opening at one axial end (fig. 18-20). The reference axis 8 (fig. 18) has a substantially vertical orientation in use. The cartridge chamber 7 is defined in an appendage 9 (fig. 1) of the bottom wall section of the reservoir 2. The accessory 9 is an integral part of the reservoir 2. The reservoir 2 may be made of plastic and is generally obtained by injection moulding.

In the embodiment shown, the opening of the cartridge chamber 7 is at the upper axial end of the cartridge chamber 7 in use. The cross-sectional shape of the opening of the cartridge chamber 7 and also of the opening thereof at an axial position in the vicinity of the opening, seen from above in the axial direction, is elongate. The same is true for the reservoir 2 and the jug 1. The upper section of the cartridge chamber sidewall 10 (fig. 18-22, 31, 37, 38) forms a sealing surface for sealingly engaging an at least partially inserted liquid treatment cartridge along its periphery.

The cartridge chamber bottom wall 11 is located at the opposite axial end of the cartridge chamber 7 with respect to its opening. The cartridge cavity bottom wall 11 includes a protruding cartridge member 12 that protrudes into the cartridge cavity 7 relative to a surrounding section of the cartridge cavity bottom wall 11. The protruding cartridge member 12 and the surrounding section of the cartridge chamber bottom wall 11 are integral parts of a single assembly, in this example the reservoir 2.

The projecting cartridge part 12 is hollow and defines a liquid passage having an opening at one axial end through which, in use, liquid is discharged. The opening forms a hole in the cartridge chamber bottom wall 11, seen from the other side of the cartridge chamber bottom wall 11 to the cartridge chamber 7. In the embodiment shown, in use, treated liquid is discharged into the kettle 1 through the opening.

The central opening is provided at opposite axial ends of the liquid channel. A plurality of

ridges

13a, 13b (fig. 20, 21), two in the embodiment shown, are provided around the central opening. The ends of these

ridges

13a, 13b are spaced apart in a tangential direction to define a slit 14 (fig. 21) which, in use, allows liquid to pass between the

ridges

13a, 13 b. Thus, even if the central opening is blocked, liquid can still flow from the cartridge chamber 7 into the liquid passage defined by the protruding cartridge part 12. In an alternative embodiment, there is only one ridge. It is interrupted once along the periphery of the central opening, thereby defining a single slit between the ends of the ridge. But a uniform distribution of the slits 14 along the periphery of the central opening will result in a better flow pattern. In particular, in the case where the cartridge cavity 7 has a cross-section of elongate shape (with the plane of the cross-section perpendicular to the reference axis 8), it is useful for it to have at least two slits 14 on opposite sides of the central opening, the at least two slits 14 being aligned with the long axis of the elongate shape.

The valve, including the valve body 15 (fig. 23-25) and the movable valve assembly 16, is inserted into the liquid passage defined by the protruding cartridge component 12. The movable valve assembly 16 is pivoted for rotation about a reference axis 17 (fig. 30) and performs a limited axial movement with respect to said valve body 15. The reference axis 17 of the movable valve assembly 16 has a substantially upright orientation in use, substantially aligned with the reference axis 8 defined for the cartridge chamber 7. In this example, it corresponds to the body axis of the movable valve assembly 16.

The valve body 15 and the movable valve assembly 16 are molded parts, each being a single body made of a single material. In one embodiment, they are injection molded parts. They may be made of plastics, for example thermoplastic materials. In this example, they are made of different materials. The valve body 15 is made of the same material as the rest of the reservoir 2 to allow the valve body 15 to be joined to the rest of the reservoir 2 by welding, for example ultrasonic welding. An example of a suitable material is polypropylene (PP). The movable valve assembly 16, which in this example lacks a closed void, is made of a material having a density greater than water. This ensures that it does not float when submerged in water. One example of a suitable material is Polyoxymethylene (POM).

The valve body 15 has a radially outer lateral surface 18 which conforms in shape to the inner surface of the liquid passage defined by the projecting cartridge part 12. The valve body may be cylindrical. The valve body 15 is bonded to the protruding cartridge component 12 and/or the cartridge chamber bottom wall 11, such as by at least one of a friction fit and a bond (e.g., an adhesive bond). The movable valve assembly 16 is an unsecured component, but its axial range of motion is defined by the

ridges

13a, 13b and the valve body 15. The movable valve assembly 16 is thus held by and between the valve body 15 and the

ridges

13a, 13b, the

ridges

13a, 13b projecting into the liquid passage defined by the projecting cartridge part 12.

The flange 19 (fig. 23-25) limits the extent to which the valve body 15, when installed, can be inserted into the liquid passage defined in the projecting cartridge part 12. This ensures that the axial range of movement of the movable valve assembly 16 is not limited too much. In addition, the flange 19 provides a contact surface for contacting the cartridge chamber bottom wall 11 to ensure that no liquid can leak out of the liquid passage between the valve body 15 and the inner surface of the projecting cartridge part 12.

The valve body 15 defines a liquid-permeable port at the axial end closest to the flange 19. A grill 20 (fig. 24-25) is disposed within the port. In this embodiment, the grill 20 is an integral part of the valve body 15. It allows liquid to pass through the port but prevents foreign objects from being inserted through the port from below. This is useful because the port is disposed within the center of the valve seat 21. In an alternative embodiment, a single cross bar may suffice for this function.

The valve seat 21 has in this embodiment a substantially conical shape. The movable valve assembly 16 has a mating surface that corresponds in shape to at least a section of the conical side surface. As will be explained, the valve body 15 moves axially into and out of engagement with the valve seat 21 to close and open the valve. The axial end of the movable valve assembly 16, where the valve assembly sealing surface 22 is provided, thereby forms an adjustment member of said movable valve assembly 16, which is selectively arranged to obstruct the flow of liquid through the port. The actuating components of the movable valve assembly 16 are located at opposite axial ends. A section 23 (fig. 26 and 30) with a plurality of recesses is provided between the adjustment member and the actuation member.

A side wall 24 (fig. 23-25) of the valve body 15 defines a recess, which side wall 24 in this example also provides the radially outer lateral surface 18, in which recess at least an axial section of the movable valve assembly 16, including at least a section of its adjusting part, is received. The recess has a substantially circular cross-section. In this example, at least a section of the recess is cylindrical in shape, but it may also be slightly conical. The valve body sidewall 24 laterally supports the movable valve assembly 16 when the movable valve assembly 16 and valve body 15 are installed within the liquid passage defined in the protruding cartridge component 12. The valve body sidewall 24 also functions to center the movable valve assembly 16 when the movable valve assembly 16 is not within the valve seat 21.

However, the movable valve assembly 16 does not contact the inner surface of the recess along the entire circumference of the circle. In contrast, the base 25 (fig. 26-30) has a cross-section (the plane of which is perpendicular to the reference axis 17) that lies within an imaginary circumscribed circle of suitable diameter. The outer profile of the cross-section contacts the circumscribed circle at a plurality of points along the circumference, the points being substantially evenly distributed along the circumference. The outer contour is located at a distance from the circumcircle in radial direction between these points in order to provide space for the liquid flowing in a substantially axial direction. In this manner, when the valve is open, the movable valve assembly 16 is still supported laterally but does not prevent the flow of liquid. In the illustrated example, the base 25 is positioned axially adjacent to the recess 23, which further reduces valve flow resistance in the open configuration.

A series of ribs 26a-26f (fig. 28) are defined on the axial ends of the movable valve assembly 16, on which the movable valve assembly 16 is supported by the valve body 15. The ribs 26a-26f all have the same shape with their apexes at the same axial position. The ribs 26a to 26f project in the axial direction toward the support surface of the valve body 15 and are defined by inclined surfaces. They are arranged along a circle centred on the axis of rotation of the movable valve assembly 16, i.e. the reference axis 17. The valve assembly sealing surface 22 is also arranged within a circle about the reference axis 17, but radially closer to the circle. The surface 22 is thus spaced from the ribs 26a-26 f. The inclined surfaces of the ribs 26a-26f have normal portions (normal) directed partly radially outwardly, partly in the axial direction and partly in the tangential direction. Thus, the inclined surfaces of the ribs 26a-26f partially face radially outward. In an alternative embodiment, the angled surfaces of the ribs 26a-26f may face partially radially inward. In each case, a further centering effect is achieved. The adjacent inclined surfaces of adjacent ribs 26a-26f face tangentially towards each other.

The valve body 15 has a mating series of sloped surfaces defined by a mating series of valve body ribs 27a-27b, the valve body ribs 27a-27b having shapes and sizes similar to the ribs 26a-26f protruding from the movable valve assembly 16. The number of valve body ribs 27a-27b is equal to the number of ribs 26a-26f on the movable valve assembly 16. The inclined surfaces of the valve body 15 face at least partially in an axial direction towards said movable valve assembly 16 and at least partially in a tangential direction, so that adjacent inclined surfaces of adjacent valve body ribs 27a-27b face each other. The inclined surfaces of the valve body ribs 27a-27b partially face radially inward. These inclined surfaces support the movable valve assembly 16, at least when the position of the movable valve assembly 16 allows liquid to flow through the ports in the valve body 15.

When the movable valve member 16 is supported only by the valve body 15, at most a minute amount of vibration is sufficient to cause the ribs 26a-26f of the movable valve member 16 to slide down the contacting inclined surfaces of the valve body ribs 27a-27 b. As a result, the movable valve assembly 16 moves in the axial direction into the valve seat 21 such that the valve assembly sealing surface 22 contacts the valve seat 21. The movable valve assembly 16 assumes one of six possible rotational positions.

If the movable valve member 16 is subsequently rotated, the interaction between the ribs 26a-f, 27a-b causes the movable valve member to move in an axial direction such that the valve member sealing surface 22 moves out of engagement with the valve seat 21. Thus, the valve is opened.

The extent of axial movement of the movable valve assembly 16 away from the valve seat 21 is limited because of the presence of the collar 28, which collar 28 has a diameter sufficient to allow it to contact the

ridges

13a, 13b, the

ridges

13a, 13b projecting from the surface of the liquid passage defined by the projecting cartridge portion 12. Although in this example the collar 28 has a substantially cylindrical shape, in other examples it may be interrupted along its circumference. It may also have a different shape, for example a star-shaped cross-section, as long as its free axial end is in a single axial position to prevent tilting of the movable valve assembly 16 when the reservoir 2 is turned upside down. This is to ensure that the movable valve assembly 16 does not get stuck when the reservoir 2 is turned upside down, for example, in order to place it in a dishwasher.

The collar 28 surrounds the actuating member, which has a smaller width and is centred on the reference axis 17, i.e. the rotation axis. The actuating member is basically a cylinder having a series of helical grooves 29a-29f (fig. 27) therein, each of the helical grooves 29a-29f opening at the end closest to the free axial end of the cylinder to allow a follower or other engaging element of the valve actuating device to enter the grooves 29a-29 f. The helical grooves 29a-29f widen towards the axially open end to facilitate the entry of such engaging elements. In addition, the number of helical grooves 29a-29f is equal to the number of ribs 26a-29f at the opposite axial end of the movable valve assembly 16, and thus the number of valve body ribs 27a-27 b. Like the ribs 26a-26f, the helical grooves 29a-29f are evenly distributed about the reference axis 17. Thus, the openings at the axial ends of the helical grooves 29a-29f are always in substantially the same position when the valve is closed. The engagement member protrudes through the central opening surrounded by the ridges 13a-13b (see fig. 22 and 31).

The actuating member of the movable valve assembly 16 is engageable by a valve actuating device to open and close the valve. In a first embodiment, the valve actuation means is comprised within the first liquid treatment cartridge 30, more particularly within its housing. In the second embodiment, the valve actuating means is comprised in an adapter 31 provided in a kit further comprising a separate second liquid treatment core 32. The first embodiment will first be used to describe the interaction between the actuating member of the movable valve assembly 16 and the actuating means.

The actuating components of the movable valve assembly 16 are included in a screw drive mechanism for converting linear, substantially axial movement of the valve actuating device into internal rotational movement of the movable valve assembly 16 about the axis 17. It is envisaged that this rotational movement is then converted into an axial movement in a direction opposite to that of the valve actuating means when starting from the closed configuration, so as to lift said movable valve assembly 16 out of contact with the valve seat 21.

The first liquid treatment core 30 comprises a core housing comprising a container-shaped part 33 (fig. 14, 15), said container-shaped part 33 being closed by a cap-shaped part 34 (fig. 16, 17) at its open end. The core reference axis 35 (fig. 3, 4) may define an upright axis corresponding to the core housing. The cartridge reference axis 35 is substantially aligned with the reference axis of the cartridge 8 and therefore the cartridge reference axis 35 is substantially aligned with the reference axis 17 of the movable valve assembly 16 when the first liquid treatment cartridge 30 is inserted into the cartridge.

The container-shaped part 33 forms the axial end of the core housing which is inserted into the core housing chamber 7. It has a recess 36 defined in an axial end wall, referred to herein as a cartridge bottom wall 37. The opening of the core recess 36 forms a hole in the surrounding section of the core bottom wall 37. The hollow protruding part 38 is arranged at least partially, in this case completely, within the core recess 36. In the illustrated example, a hollow protruding member 38 protrudes from a wall section at an axial end of the core recess 36 opposite and facing the opening of the core recess 36.

When this first liquid treatment cartridge 30 is inserted far enough into the cartridge seat, the hollow protruding part 38 is arranged to receive the actuating part of said movable valve assembly 16, in particular comprising the section provided with the helical grooves 29a-29 f. The hollow projecting member 38 thus has an outer diameter which enables it to be inserted into the central opening at the end of the liquid passage defined by the projecting cartridge part 12. Further, there is sufficient distance between the radially outer surface of the hollow projecting member 38 and the recess sidewall 39 (fig. 5-8) of the core recess 36 to enable at least one axial end of the projecting cartridge seat member 12 to be received within the core recess 36. When this axial end section is received within the core recess 36, the recess sidewall 39 remains spaced from the insertion portion of the protruding core print member 12. Further, the free axial end of the projecting cartridge seat member 12 is spaced from the axial end wall of the cartridge recess 36. This spacing allows liquid to flow into the recess between the inserted portion of the protruding cartridge component 12 and the recess side wall 39. From this recess, liquid can flow into the protruding cartridge part 12 through at least the slits 14a, 14 b.

The hollow protruding member 38 may have a substantially cylindrical outer surface as shown. In an alternative embodiment, one or more protrusions are provided on the outer surface which latch behind the

ridges

13a, 13b to hold the first liquid treatment core 30 in an operative axial position in the core seat. Alternatively, a friction fit may be provided between the outer surface of the hollow protruding member 38 and the radially inner edges of the

ridges

13a, 13 b. For this purpose, the hollow protruding part 38 may be compressed in the radial direction by engagement with the

ridges

13a, 13 b. To facilitate this compression, the

discontinuities

40a and 40b (fig. 7, 8, 11, 12) on the wall of the hollow protruding part 38 extend over at least part of the axial extent of the latter, i.e. the wall of the hollow protruding part 38, to the edge at its free axial end. As a result, the area of the slits 14a, 14b determines the flow rate through the cartridge when the valve is open. In addition, the first liquid treatment wick 30 is correctly aligned with the wick. Skew positioning of the first liquid treatment core 30 is substantially avoided.

The portion of the screw drive mechanism provided with the first liquid treatment core comprises a raised threaded

section

41a, 41b provided on the inner surface of the hollow protruding part 38. Each of the threaded

sections

41a, 41b is shaped and dimensioned to engage one of the

helical grooves

29a, 29b so as to contact at least one of the helical sidewalls of the grooves 29a-29 f. Each such helical sidewall forms a helical profile. The threaded

sections

41a, 41b inserted into the groove 29 engage at least one profile when the valve is open, and the threaded

sections

41a, 41b inserted into the groove 29 engage at least the opposite one profile when the valve is closed. There will normally be some play so that the

thread sections

41a, 41b will engage only one of the two profiles at a time.

In this embodiment, there are

fewer thread sections

41a, 41b than helical grooves 29a-29 f. Thus, in each direction (insertion and removal of the first liquid-treatment core) there are two pairs of spiral profiles and means for engaging the spiral profiles.

It should be noted that the tangential spacing between adjacent members for engaging the helical profile is a multiple of the tangential spacing between adjacent helical grooves 29a-29 f. To further facilitate insertion, the threaded

sections

41a, 41b taper towards the end closest to the free axial end of the hollow projecting member 38.

It should further be noted that the threaded

sections

41a, 41b do not always have to extend to the free axial end of said hollow protruding part 38. The threaded

sections

41a, 41b need not each extend through a full turn about the axis 35. In an alternative embodiment, the helix angle is varied in the axial direction, e.g. continuously, so that the grooves 29a-29f are only helical (spiral), rather than helical (spiral).

Before discussing an alternative valve actuation device in the form of an adapter 31, the remainder of the first liquid treatment cartridge 30 will be described.

The treatment chamber is defined by a container-shaped member 33. In the illustrated embodiment, the process chamber is closed at the top by a cap member 34. In one embodiment, a liquid permeable mesh (not shown) may be disposed on the inside of the cap member 34.

The treatment chamber is arranged to contain one or more liquid treatment media for treating a liquid, such as an aqueous liquid. One example may be drinking water. The liquid treatment medium includes a liquid treatment medium for treating a liquid in a diffusion process, such as a medium to remove or add a component to a liquid. In particular, the medium may comprise a liquid treatment medium for treating a liquid by adsorption, which for present purposes includes ion exchange, adsorption and absorption. The media may comprise activated carbon. They may comprise ion exchange resins, such as cation exchange resins. The cation exchange resin may comprise a cation exchange resin in the hydrogen form. In particular embodiments, a majority of the ion exchange resin is in the hydrogen form. To make more efficient use of the available volume, the cation exchange resin may be a weakly acidic cation exchange resin. The liquid treatment medium will typically be at least partially in granular form.

The container-shaped member 33 is provided with two liquid-

permeable windows

42a, 42b, said

windows

42a, 42b forming liquid outlets in fluid communication with the treatment chamber. The liquid-

permeable windows

42a, 42b are each provided with a grid for holding a granular liquid treatment medium. Any similar mechanical filter component may alternatively be employed.

The cap-like part 34 (fig. 16, 17) is provided with liquid-permeable windows 43a-43d forming liquid inlets, and with vent holes 44a-44 d. The cap member 34 has a central dome-shaped section at the top of which are located the vent holes 44a-44 d. The liquid-permeable windows 43a-43d are arranged at axial positions closer to the liquid-

permeable windows

42a, 42b forming the liquid outlets than the discharge apertures 44a-44 d. Thus, there is less likelihood of air bubbles blocking the liquid-permeable windows 43a-43d forming the liquid inlet when the first liquid treatment core is immersed in the liquid to be treated poured into the reservoir 2.

The container-shaped part 33 comprises a sealing edge 45 at the end opposite to the wick bottom wall 37. The sealing rim 45 extends around the circumference of the container-shaped part 33 and closes on itself around the core reference axis 35. The sealing edge 45 separates the liquid-permeable windows 43a-43d forming the liquid inlet from the liquid-

permeable windows

42a, 42b forming the liquid outlet.

The sealing edge 45 comprises a radially inner sector 46 (fig. 5, 7) projecting in a radial direction at least partially along the periphery of the latter, i.e. of the container-shaped part 33, with respect to a lateral wall 47 of said container-shaped part 33. Score 48 separates the radially outer section from the radially inner edge section 46. The sealing edge 45 can thus be deflected relatively easily. The radially outer section includes a section forming an upstanding ridge 49 and an overhanging section 50, both angled relative to the radially inner section 46 and presenting an at least partially radially outwardly facing surface.

The upstanding ridge 49 surrounds the liquid-permeable windows 43a-42d forming the liquid inlet, at least a section of the windows 43a-42d being positioned at an axial position closer to the liquid-

permeable windows

42a, 42b forming the liquid outlet than the edge of the upstanding ridge 49. Thus, the reservoir can be completely emptied of the liquid to be treated.

The radially outwardly facing surface presented by the upstanding ridge 49 and the depending edge section 50 is configured to engage the cartridge chamber sidewall 10 such that the mouth of the cartridge is sealed and the first liquid treatment cartridge 30 is retained within the cartridge. It is therefore not necessary to rely solely on the engagement of the hollow projecting member 38 with the

liquid passage ridges

13a, 13b in order to retain the first liquid treatment core 30.

The cap member 34 is provided with a flange 51 along its periphery. The flange 51 may be placed on top of and against the radially inner edge section 46 in order to bond the cap-shaped member 34 to the container-shaped member 33 after the latter, i.e. the container-shaped member, has been filled with the liquid treatment medium. If it is desired to allow a greater degree of flexing of sealing edge 45 during use, flange 51 need not engage radially beyond score 48.

Instead of using the first liquid treatment core 30, a kit of parts comprising the second liquid treatment core 32 and the adapter 31 may be used.

The second liquid treatment core 32 is substantially identical to the first liquid treatment core 30, except that it does not include components forming the valve actuation means. Thus, the second liquid treatment core comprises a container-shaped part 52 and a cap-shaped part 53 (fig. 37). The cap member 53 is identical to the cap member 34 of the first liquid-treating wick 30.

The container-shaped member 52 has a sealing edge 54 (fig. 32) identical to the sealing edge 45 of the first liquid treatment core 30. It also has an axial end wall (fig. 37, 38) forming a core bottom wall 55, in which liquid permeable windows 56a, 52b (fig. 32, 37) forming liquid outlet windows are formed. These are adjacent to the core recesses 57 in the core bottom wall 55 (fig. 32, 37, 38). Unlike the core recess 36 of the first liquid processing core 30, the core recess 57 of the second liquid processing core 32 does not have a hollow projecting member disposed therein. The cartridge recess 57 is wide and deep enough to receive the projecting cartridge component 12 with the adapter 31 in place, in this example the adapter 31, inserted into the central opening of the liquid passage defined in the projecting cartridge component 12.

In the absence of the hollow projecting member 38, the second liquid treatment core 32 is held in place axially only by the interaction of the sealing edge 54 with the cartridge chamber sidewall 10.

The adapter 31 is a single molded body, for example a plastic body obtainable by injection molding. It has a base member 58 (fig. 33-35). A handle 59 projects from one side of the base member 58. The hollow member 60 protrudes from the other side of the base member. It is contemplated that when the adapter 31 actuates the valve, the adapter 31 is caused to have an adapter reference axis 61 (fig. 33) aligned with the reference axis 17, the reference axis 17 being associated with the movable valve assembly 16.

The hollow protruding member 60 is arranged to receive the actuating member of said movable valve assembly 16, in particular comprising a section provided with helical grooves 29a-29f, when inserted far enough into the liquid passage defined in the protruding cartridge part 12. Whereby the hollow projecting member 60 has an outer diameter such that it can be inserted into the central opening at the end of the liquid passage defined by the projecting cartridge part 12.

The hollow protruding member 60 may have a substantially cylindrical outer surface as shown. In an alternative embodiment, one or more protrusions are provided on the outer surface, which latches behind the

ridges

13a, 13b in order to hold the adapter 31 in an operative axial position in the cartridge seat. Alternatively, a friction fit may be provided between the outer surface of the hollow protruding member 60 and the radially inner edges of the

ridges

13a, 13 b. For this purpose, the hollow protruding part 60 may be compressed in the radial direction by engagement with the

ridges

13a, 13 b. To facilitate this compression, the

discontinuities

62a and 62b on the wall of the hollow protruding member 60 extend over at least part of the axial extent of the latter, i.e. the wall of the hollow protruding member 60, to the edge at its free axial end.

The raised

thread sections

63a, 63b are provided on the inner surface of the hollow protruding member 60. Each of the threaded

sections

63a, 63b is shaped and dimensioned to engage one of the

helical grooves

sections

63a, 63b inserted into the groove 29 engage at least one profile when the valve is open, and the threaded

sections

63a, 63b inserted into the groove 29 engage at least the opposite one profile when the valve is closed. There will normally be some play so that the threaded

sections

63a, 63b will engage only one of the two profiles at a time.

In this embodiment, there are

fewer thread sections

63a, 63b, i.e., two, than helical grooves 29a-29 f. The tangential spacing between adjacent members for engaging the helical profile is a multiple of the tangential spacing between adjacent helical grooves 29a-29 f. To further facilitate insertion, the threaded

sections

63a, 63b taper towards the end closest to the free axial end of the hollow protruding member 60.

It should further be noted that the threaded

sections

63a, 63b do not always have to extend to the free axial end of said hollow protruding part 60, nor do the threaded

sections

63a, 63b have to extend over one full turn around the adapter reference axis 61, respectively.

Spacer blocks (fig. 34, 35) in the form of radially extending ribs 64a-64d extend radially across the adapter base 58 a distance sufficient to prevent their insertion into the liquid passage defined by the projecting cartridge component 12. When the protruding member 60 is inserted into the liquid passage, the radially extending ribs 64a-64d act as stops so that a space is provided between the adapter base 58 and the protruding cartridge component 12 to facilitate liquid entry.

In use, the adapter 31 is first installed by inserting the hollow projecting member 60 into the liquid passage in the projecting cartridge part 12. This will open the valve, wherein axial movement of the adapter 31 is translated into rotational movement of the movable valve assembly 16, which in turn causes it to be lifted out of contact with the valve seat 21. The friction fit between the adapter 31 and the

ridges

13a, 13b prevents axial movement of the adapter 31 in the opposite axial direction without sufficient pulling force being applied to the handle 59. The second liquid processing core 32 is then inserted into the cartridge chamber 7 such that it is closed by the interaction between the core sealing edge 45 and the cartridge chamber sidewall 10. The protruding cartridge seat member 12 is received within the cartridge recess 57. The liquid poured into the reservoir 2 flows through the chamber in the liquid treatment core 32 and is treated in the process. Liquid flows out through the liquid-

permeable windows

42a, 42b and then into the wick recess 57 between it and the protruding wick-holder part 12. The liquid flows through the slit 14 between the ends of the

liquid channel ridges

13a, 13b, past the collar 28 of the movable valve assembly 16, the recessed section 23 and the base 25 of the movable valve assembly, and then out through the port in the valve seat 21. The volume of the cartridge recess 57 can be kept small due to the small radial dimensions of the valve. The chamber in the second liquid treatment core 32 may thus have a relatively large volume. The valve assembly sealing surface 22 is lifted completely out of contact with the valve seat 21 so that no part of the reference axis 17 about which the valve seat 21 is disposed moves laterally without rotation.

The invention is not limited to the embodiments described above, which may be varied within the scope of the appended claims.

Instead of using

helical thread sections

41a, 41b, protruding lugs, for example, having a circular profile may be used to engage the surfaces defining the helical grooves 29a-29 f.

The reservoir provided with the cartridge need not be a reservoir configured to be suspended within a container for collecting the treated liquid. For example, the reservoir may be a water tank of an appliance, such as a coffee maker (e.g. drip coffee maker), a steam iron or a liquid dispenser, e.g. a liquid dispenser integrated into a freezer.

List of reference numerals

1 kettle

2 liquid reservoir

Ridge on reservoir 3

4 cover

5 closure element

6 pouring spout

7 core base chamber

8 reference axis

9 Accessories

10 core print chamber side wall

11 core seat cavity bottom wall

12 projecting core print seat part

13a, 13b ridges

14 slit

15 valve body

16 movable valve assembly

17 reference axis of movable valve assembly

18 outer surface of valve body

19 valve body flange

20 grid

21 valve seat

22 sealing surface of valve assembly

23 recessed section of valve assembly

24 valve body side wall

25 base of movable valve assembly

26a-26f fins

27a-27b valve body ribs

28 shaft ring

29a-29f helical groove

30 first liquid treatment core

31 adapter

32 second liquid treatment core

33 Container-shaped Member

34 hat-shaped component

35 core reference axis

36 core recess

37 core bottom wall

38 hollow projecting part

39 side wall of recess

40a, 40b discontinuities

41a, 41b thread section

42a, 42b form liquid-permeable windows of the liquid outlet

43a-43d form liquid-permeable windows of the liquid inlet

44a-44d Vent hole

45 sealing edge

46 radially inner edge section

47 core side wall

48 notches

49 upstanding ridge

50 depending edge section

51 flanges on a cap-shaped part

52 Container-shaped part

53 hat-shaped component

54 sealing edge

55 core bottom wall

56 liquid permeable window

57 core recess

58 adapter base member

59 handle

60 hollow protruding member

61 reference axis of the adapter

62a, 62b discontinuities

63a, 63b threaded section

64a-64d radially extending ribs

Claims

1. A valve for regulating the flow of liquid through a passage in a cartridge wall of a liquid handling system, said valve comprising at least:

a valve body (15) defining at least one port; and

at least one movable valve assembly (16) movable relative to the valve body (15);

the at least one movable valve assembly (16) including an adjustment member for selectively obstructing the flow of liquid through the at least one port and an actuation member for engaging a valve actuation device inserted into the cartridge, characterized in that:

the actuating means is included in a mechanism for converting linear motion of the valve actuating device into rotational motion of the at least one movable valve assembly (16) and includes at least one pair of helical profiles and means for engaging each of the helical profile members (41a, 41 b; 63a, 63 b).

2. A valve according to claim 1, wherein the helical profile is defined by a helical groove (29a-29f), the helical groove (29a-29f) being intended to receive a member (41a, 41 b; 63a, 63b) for engaging the helical profile.

3. The valve as set forth in claim 1, wherein,

wherein the valve body (15) comprises at least one inclined surface facing the axis of rotation of the at least one movable valve assembly (16) at least partly in an axial direction and partly in a tangential direction; and

wherein the at least one inclined surface is arranged to support at least one of the at least one movable valve assembly (16) in a position of the movable valve assembly (16) at least allowing liquid to flow through the port.

4. A valve according to claim 1, wherein the valve body (15) defines a valve seat (21), the valve seat (21) being adapted to receive an adjustment member in which the port is provided.

5. The valve as set forth in claim 4,

wherein the valve body (15) comprises at least one inclined surface facing, partly in the axial direction and partly in the tangential direction, the axis of rotation (17) of the at least one movable valve assembly (16) comprising the adjustment member; and

wherein the at least one inclined surface is arranged to support at least a movable valve assembly (16) comprising an adjustment member.

6. A reservoir for a liquid treatment system, comprising:

a cartridge, the cartridge comprising:

a chamber (7) having an opening at an axial end through which a liquid treatment core (30; 32) is at least partially insertable in an axial direction;

a sealing surface for sealingly engaging a liquid treatment core (30; 32) inserted at least partially along its periphery;

a liquid passage through a wall (11) of the chamber (7); and

a valve according to any preceding claim, arranged to regulate the flow of liquid through the liquid passage.

7. The liquid reservoir as set forth in claim 6,

wherein at least a section of the liquid passage is defined by the cartridge part (12);

wherein the valve body (15) is inserted into the liquid passage; and

wherein the at least one movable valve assembly (16) is held by and located between the valve body (15) and the at least one section (13a, 13b) of the cartridge part (12) protruding into the liquid passage.

8. A device for actuating a valve, the device comprising a section for engaging an actuating member of a movable valve assembly (16);

wherein the segment is insertable in an axial direction through the opening so as to allow liquid to reach the valve; the method is characterized in that:

the segments are included in a mechanism for converting linear motion of the actuating means in an axial direction into rotational motion of the movable valve assembly (16) and include at least one pair of helical profiles and means for engaging each of the parts of the helical profiles.

9. The apparatus of claim 8, wherein the first and second electrodes are disposed on opposite sides of the substrate,

wherein the section for engaging an actuating member of the movable valve assembly (16) comprises a hollow member (38; 60) for receiving at least an axial end of an actuating member of the movable valve assembly (16); and

wherein components of a mechanism are provided on an inwardly facing surface of the hollow part (38; 60), the components of the mechanism being included in the section for engaging the actuating part of the movable valve assembly (16).

10. The apparatus of claim 9, wherein the first and second electrodes are disposed on opposite sides of the substrate,

wherein a member of the mechanism is included in the section for engaging an actuating part of the movable valve assembly (16) protrudes from an inwardly facing surface of the hollow part (38; 60).

11. The apparatus of claim 8, wherein the first and second electrodes are disposed on opposite sides of the substrate,

wherein the section for engaging an actuating member of the movable valve assembly (16) is at least partially disposed within a recess (36) of the device.

12. The apparatus of claim 11, wherein the first and second electrodes are disposed in a substantially cylindrical configuration,

wherein the recess (36) is defined by a side wall (39), said side wall (39) closing on itself around the section for engaging the actuating member of the movable valve assembly (16) and being radially spaced from the section for engaging the actuating member of the movable valve assembly (16).

13. The apparatus of claim 8, wherein the first and second electrodes are disposed on opposite sides of the substrate,

wherein the actuating means comprises a part (45), said part (45) being at a distance from a section of the actuating member for engaging the movable valve assembly (16) in order to retain the actuating means within a valve seat comprising the valve.

14. The apparatus of claim 8, wherein the first and second electrodes are disposed on opposite sides of the substrate,

wherein the actuating means comprise a container-shaped part (33);

wherein the section for engaging the actuating member of the movable valve assembly (16) is provided at a bottom wall (37) at an axial end of the container-shaped member (33); and

wherein at least one liquid-permeable window (42a, 42b) is provided in the bottom wall (37).

15. The apparatus of claim 8, wherein the first and second electrodes are disposed on opposite sides of the substrate,

wherein the section for engaging the actuating member of the movable valve assembly (16) comprises a member (41a, 41 b; 63a, 63b) for engaging the helical profile of the mechanism; and

wherein the means (41a, 41 b; 63a, 63b) for engaging the helical profile are shaped for insertion into a helical groove (29a-29f) defining the helical profile.

16. The apparatus of claim 8, wherein the first and second electrodes are disposed on opposite sides of the substrate,

wherein the section for engaging the actuating member of the movable valve assembly (16) comprises a member (41a, 41 b; 63a, 63b) for engaging the helical profile of the mechanism;

the means (41a, 41 b; 63a, 63b) for engaging the helical profile comprise at least one section of protruding thread.

17. The device of claim 8, wherein the device is configured to actuate a valve according to any one of claims 1-5.

18. A liquid treatment cartridge having a housing, the housing comprising:

at least one liquid-permeable window (43a-43d) forming a liquid inlet

At least one liquid-permeable window (42a, 42b) forming a liquid outlet

At least one process chamber located between liquid permeable windows (43a-43 d; 42a, 42b) forming liquid inlets and outlets and in liquid communication with said windows (43a-43 d; 42a, 42 b); and

the device according to any one of claims 8-17.

19. An adapter for enabling placement of a replaceable liquid treatment cartridge in a cartridge of a liquid treatment system, the adapter comprising a device according to any of claims 8-17.

20. Kit of parts for a liquid treatment system comprising an adapter (31) according to claim 19 and a liquid treatment core (32) having a housing comprising:

at least one liquid-permeable window forming a liquid inlet;

at least one liquid-permeable window (56a, 56b) forming a liquid outlet; and

at least one process chamber located between liquid-permeable windows (56a, 56b) forming liquid inlets and outlets and in liquid communication with said windows (56a, 56 b).

21. Liquid treatment system comprising a liquid reservoir (2) according to any of claims 6-7, a replaceable liquid treatment cartridge (30; 32) and a valve actuating device according to any of claims 8-17.